Yangon: Myanmar opposition leader Aung San Suu Kyi on Monday agreed to end her party's boycott of Parliament to make party’s first debut in the ongoing assembly session on Wednesday after backing down over the wording of an oath for new members of parliament.

The decision has set aside her first major dispute with the government since winning by-elections and clearing the way for what could be an acceleration of reforms.

She agreed to swear to protect a constitution drafted under military control that she says is undemocratic and needs to be amended.

"In politics it is essential to give and take," the Nobel Peace Prize laureate told reporters after a party meeting.

"As a gesture of respect to the desires of the people and in consideration of the requests made by lawmakers from democratic parties and independent lawmakers, we have decided to attend the parliament ... We will go there as soon as possible and take the oath."

Suu Kyi's change of heart came as U.N. Secretary-General Ban Ki-moon was addressing parliament in the capital, Naypyitaw.

She is due to meet Ban in Yangon on Tuesday before travelling to Naypyitaw for Wednesday's Parliamentary session, party officials said.

The NLD boycotted general elections in November 2010, when Suu Kyi was under house arrest, saying the poll was rigged in favour of the military-backed Union Solidarity and Development Party (USDP).

The USDP won an overwhelming victory, but a new government under President Thein Sein embarked on political and economic reforms after 50 years of military rule and persuaded Suu Kyi to enter the political process.

The NLD won all but one of the 44 seats it contested in April 1 by-elections after a campaign in which Suu Kyi, who won one of the seats, made the amendment of the 2008 constitution drawn up under military supervision, a central theme.

The charter gives the military wide powers, including the ability to appoint cabinet members, take control in a state of emergency and occupy a quarter of seats in parliament.

The NLD wanted to replace the words "safeguard the constitution" with "respect" it in the parliamentary oath. But the ruling, army-backed party rejected the NLD's demand.

Suu Kyi said the by-election victory showed the support of the people and her party had to give in to their wishes.

"We need to show practically that we have real will to cooperate and compromise," she said.Although the NLD has only a handful of seats compared with the USDP and the military, her presence in parliament will keep the focus on reforms and could even lead to their acceleration.

The European Union, United States and other countries have eased sanctions on Myanmar in response to the liberalisation but the dispute over the oath could have delayed a further thawing in relations, had it festered.

UNSG welcomesU.N. chief Ban welcomed Suu Kyi's announcement."This is encouraging. I respect her decision. Leaders should work in the long-term interests of the nation," he told reporters shortly after becoming the first foreign dignitary to address the fledgling parliament.

He said it would now be easier for Thein Sein and Suu Kyi to work together."Both leaders should fully cooperate and discuss all matters. There are always difficulties that can be overcome in the interests of the nation," he added.

In his speech to parliament, Ban urged Western powers to ease sanctions further to help Myanmar and even suggested the country could become a model for democracy after decades of repression and isolation under military rule.

Ban said he had no doubt that, under the year-old civilian government, Myanmar would catch up with its Asian neighbours, but he warned of "perils and pitfalls" on a difficult road.

"Today, I return to a new Myanmar, a Myanmar that is making history. The dramatic changes sweeping Myanmar have inspired the world," Ban said.

"More needs to be done. Today, I urge the international community to go further in easing or suspending trade restrictions and other sanctions."

Ban's visit is his first since July 2009, when Senior General Than Shwe ruled Myanmar at the head of a regime that brutally suppressed dissent.

But under Thein Sein, the junta's former fourth-in-command, the government has eased media censorship, legalised trade unions, freed more than 600 political prisoners and begun an economic overhaul.

It has also struck ceasefire deals with ethnic minority rebel groups.Ban signed an agreement on Monday offering U.N. technical support for Myanmar's first census since 1983 and he will travel to Shan state, one of the world's biggest opium-growing regions, to assess moves to eradicate opium poppy cultivation.